28432443 has 8 divisors (see below), whose sum is σ = 40826128. Its totient is φ = 17496864.

The previous prime is 28432421. The next prime is 28432471. The reversal of 28432443 is 34423482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28432443 - 2¹² = 28428347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28432443.

It is not an unprimeable number, because it can be changed into a prime (28432403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364480 + ... + 364557.

It is an arithmetic number, because the mean of its divisors is an integer number (5103266).

Almost surely, 2^28432443 is an apocalyptic number.

28432443 is a deficient number, since it is larger than the sum of its proper divisors (12393685).

28432443 is a wasteful number, since it uses less digits than its factorization.

28432443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729053.

The product of its digits is 18432, while the sum is 30.

The square root of 28432443 is about 5332.2080792107. The cubic root of 28432443 is about 305.2141933569.

The spelling of 28432443 in words is "twenty-eight million, four hundred thirty-two thousand, four hundred forty-three".